When should an adult go to the dr.'s for a fever?

My husband is running a 102 fever. He wants to go to work still...he works in a freezer warehouse...I'm pregnant and we need all the hours and money he can get. But at 102 should he be forced to stay home? And if it were to get higher when should he go to the dr.'s? I've heard that you should take them if their at 102, or other people say take them at 104...which is it? And me being pregnant, should I avoid him so I don't catch it and endanger my unborn baby? I'm 35 weeks if that matters...